Multiple steady-rest for grinding-machines.



C. H. NORTON. MULTIPLE STBADY REST PoR' GRINDING MACHINES.

APPLICATION PILBD MARZO, 1912. Y

Patented Dec. 3, 1912. v

's sHBBTs-sHBBTVl.

C, H. NORTN. MULTIPLE STEADY REST FOR GRINDING MACHINES. y

' 'APPLICATION FILED MAR. 20, 1912.

Patented Dec. 3, 1912.

3 SHEETS-SHEET 2.

APPQIGATION FILED MAR. 20, 191?.

Patented Dec. 3, 1912.

s SHEETS-5111111113.

ww Mh Nm.

entren sra'rus PATENT onirica.

cHa'nLns-H.v NORTON, or' Woncns'rnn, MAssAclUsETTs", -assIaNzusty To NORTON GRINDING COMPANY, or WORCESTER, MASSAC MASSACHUSETTS.

. MULTIPLE STEADY-REST FOR GRINDINGHMCHIES.'

T o all whom it may concern:

Be it known that lI, CHARLES H. NORTON, a citizen of the United States, residing at EToi-cest n', in the county ,of lVorcester and State of "it-lassachuse'tts, have invented a new and useful Multiple Steady-Rest for Grinding-Machines,y of which the following is aspeciiication. This invention relates to that class of grinding machines 1n which the work 1s held in position Ato be operated upon by an axi-l while it decreases in size and will be auto.

matically checked at a definite point so that if the attendant does not' stop the machine immediately after this point is reached the wheel, and also the work, can continue to rotate, but without performing any further grinding operation; and to provide a simple and convenient means for adjusting the limiting point at which the operation ceases.

The invention also involves improvements in operating means for the steady rests applicable either to a plurality of steady rests or to a single one and other improvements pivoted gib 16 adapted to'be adjusted, as by` in4 details of construction as will appear hereinafter.

Reference is to be had to the accompanying drawings in which--A I Figure 1 is side elevation of a grinding machine constructed in accordance with this invention; Fig. 2 is a side elevation of one of the steady rests and operating devices on enlarged scale, and Fig. 3 is an end elevation thereof showing certain parts in transverse section.

The invention is shown as applied to a grinding machine having a base or frame 10 and a rotary grinding wheel 11, a headstock 12 and a tail-stock 13 for supporting the work,v of ordinary construction, arel shown. Mounted on ways 14 on the bed are a plurality..offback restS.,-l5 each l-iavingf a screw and nut 17, the former being pivoted 'tothe back rest to permit the back rest to be Specification of Letters Patent. Application ined. March ao,

1912. Serial No. 685,073.

guided along the waysl and to be dismountedv from the frame. In this instance a plurality of these back restsareshowneach being provided A.with a steady rest 20 having a spherical surface 18 on which the steady rest can swing and a movable rod 1-9 carrying at its lower end a roller 21 adapted to Patented Dec. 3, 1?12.

move on a flat surface 22 on 'the bed. The

steady rest 2O is provided with a work support shoe 23 removably mounted thereon to engage the work and hold itl firmly between centers. The details of this -part of the device are not described in full as they do not constitute a feature of this invention.

For the purpose of working the several steady rests together and operating upon them simultaneously and equally, each of them is provided with a transverse adjusting screw 25 and with an inclined adjusting screw 26 by which the steady rest can be moved forward, or up, and toward the work. The screw 25 engages the end of the steady rest so that as the screw is fed forward it eventually comes. into position to holdthe steadyl rest firmly up to the work. The screw 26 is threaded into an upwardly inclined arm on the steady rest and presses on the end of the rod 19, so that when it is fed forwardl it exerts an upward pressure on the steadyV rest and holds it firmly in position. These screws 25 and 26 are provided with knurled heads for hand adjustments.

For the purpose o providing for the simultaneous adjustment of these several screws each one has a. gear or pinion as 27 or 2S fixed thereon. The rotation of these pinions obviously will rotate the screws and adjust them longitudinally. To operate these pinions a frame is provided comprising two racks 29 and 30, connected at one end by al yoke 31 pivoted to heads 32 and on fthe racks. One of the'se connections is made adjustable' by providing the yoke with a 'slot 34. This yoke also is provided with-` another slot-"35 in which is adjustably connected a. member 36 to which 1s securedthe end of a spring?, the front end-of which is hooked into an eye in a bracket 38 fixed to; i,

the back rest 15 located at the opposite end-fv of the machine.l The yoke-31 Vprovided y.

1: with am operating handle' B9 A'i'vhiclradapts ros L so? .vided wit-ha screw clamp 44 and the 'slotclaiiip 44' to holdfthe yolie in-thatpsition.. 'I h'isg aswill begpb'vious, turns all the screwsl ser thefstea' rests from' the pressure 4from ythe Q, screws 2o.

thisitiinela new piece of work canbe insert- 'edgiffdesired and if this y'iswdone-ths only sure that the" work'shall be held', steady throughout v the operation to produce a duplicate piece' of work is to loosen the clamp racks forward asfast asthe grinding opera- 'screws 'will go g .forward together. s In" order lto insure thatpffeach' grinding operation.' thus- ,perfcrmed shall be exactly like those preyiously performed, a stop device' is'provided 2 constructed as follows. `Each .ofthe gears z or pinions 77 ,28 is provided with 'ahub 30. 48on eac' 0 .whichfis located a split ring 49 integrally connected with" a split 'ring 50.

i th iifeedofthescrews. y

. will be. understood of cursethat the usualgcr any, d eviceO is employed t'o. stop vvthe. :feed ofthe grinding wheel, and' 1t isso u, adjusted that -zitstops' the feed at-thetime when the several'screws 52 of both' series .come into engagementwith theirresp'ect'ive' steps. This results Iin', bringing work exactly to thegsam'eposition every.vv time and leaving.- it in' such: conditionthat if the; ma-

vchinefcontirnres to operateit will.. be an; idleI A I' operation notperlforinl-ng -any furtherwork i On vthis-account it 4has beenjfoundpossible 5 iteapuutseveral nf the se1machinesI-in charge ofonefman vas theres no danger ofthe work `:being-spoiled ifhe does-not get back to 'each ql il machine-:when,its operationis completed.

'f v Moreover,-the yremovalof the work from the grindingy wheels is lan almost instantaneous operation, all of the steady -rests comlng back together, and there is no possibility of' an operator performing this operation 1n a' Y'Wrong way so as to injure the work. Consequently an absolutely uniform series ofl Y and permits them' to turn down- ...wardaboiit the pivoting surfaces (18."1-At thingthe operator ,has to do 1n order 'to in- 44 andallow the 'spring tozpull the yoke and .f It'w-nlbe obvious .of course thatall'f-the.

th'ev'Lreach them will positively stop the furl operations can be performed. Moreover all the steady rests move together as. one and this movement-is controlled by the two end fones, whichfre'st' against the work where it is centered and Where it can not bebent. "fliereforeif vthe Awork is bent or otherwise out of trueatany Apointbetw'een thecenters the steady'rest at that pointcannotfollow up', the low place-on the work, beyond the vs--themfback-or'up` This relieves pointtowhich the endrests are limited@4 Although I have illustrated and described a preferred form of the invention, I

.am a'war'ethat many modificationscan be made therein .by anyiperson skilled in' the art without departing from the scope of the invention as expressed in the. claims. There-"- =fore, I do not wish to belimited to allthe details of construction herein shown and described but- What I do claim iszv y with the head and tail centers vfor holding the work', of a pluralityof'steady rests for v-sitionof all the steady rests -by the' position of-those nearsaid'centers.4

2. In a' grinding machine, the combination with thehead and tailcenters-for holding the worlnof a' plurality .ofsteady rests for fthe work, `and yielding means controlled by vthe end center rests forjcontinuously'holding'thesteady rests up to the'wo'rk both 1 1.'In a grinding .mach1ne,fthe combination o horizontally and vertically. as the work is' lbeing-ground. g

3, In a grinding maohine, the.combination with, a'series of steady rests,of means conltrolled by the endeenterrests forsimultaneously forcing the whole series vof steady rests horizontally towardv the work and raisling them.

Lf In a grinding machine, the combination with the grinding wheel,l of a plurality of ysteady rests for the worln'and means for simultaneously moving all of vsaid steady rests to keep them irmly in contact'with the VWork as it decreases in size.

Y 5. In` a grindingmachine, the. combination of a plurality'of steady-rests for the work, and yielding means for simultaneously forcing the steady rests toward the work. g

6. In a grinding machine, the combina- -tion with a plurality of -stead'y rests for the"w.ork," of means'for forcing said" steady rests .towardthe work simultaneously and equally'and in two directions;

7. In a'gri dingmachine, the'combination of a pluralityof steady-'rests for the worlgand means for simultaneously .Withdrawing all of said' steady' rests directly back'from thegwork and at-the-'same time allowing said.- steady rests to drop down by gravity,

8. In a grinding machine, the combination with aplurality of independently movable steady rests, of yielding means for moving all of said steady rests toward the work, and means for positively limit-ing said inotion of each steady rest.

y9. In aA grinding machine, the combination of a plurality of steady rests for a 'j singlev piece of work, a slide, andmeans whereby when said slide is movedy said steady rests will be simultaneously released v work, means for simultaneously releasing all from contact with the work. v

10. In a grinding machine, the combination with a plurality'of steady rests for a,l

single piece of worlgof a slide,.means whereby when said vslide is moved in one direction said steady rests will be simultaneously released from the work, and means connected with said slide for yieldingly forcing. the v. steady rests sini ul taneously towardthe work.

11. In agrinding macl ine, the combinationwith a plurality of lsteady rests for the work, of yielding means for forcing lSaid steady rests'towardthe work simultaneouslyv of said steadyrests from the work, means for yieldingly forcing said steady rests back toward. the work, and two independently adjustable stops for each steady rest, one for limiting its niotion directly toward the f work, and the other for arresting its downward mot-ion, whereby when the yielding means 'is put intoop'eration each'steady rest will 'be' caused to move up to apredetermined vposition both-horizontally and vertically vas :tast as the grindingwill permit, and cease ino-ving farther from that point.

'14. In a grinding machine, the combination of aplurality of -movably mounted .steady rests,- a'screw for operating each steady resttoward the l work, a lgear .or pinion fixed on each screw and a reciprocable rack meshingwith allfof said pinions for simultaneouslyv adjusting the 'several' steady rests, l y

15. grinding machine,'the combination with a plurality of independently movable steady rests, of. two screws at anangle to each other-fofrmoving each steady resttoward the 'worln agear or pinion on each screw,- a reciprocable frame having a rack thereon,| onemeshing with each set of gears `or pinions, whereby when said frame recip- 'j rocates all of said gears and pinionsrwill be rotated and all of said steady rests adjusted equally, and means ,whereby the relative positions of said racks on the frame with respect'to each other can be adjusted.

16. In a grinding machine, the combination with a plurality of independently movable steady rests', of a screw Afor moving each steady rest toward the '.work, a gear or 'pinion oneach screw, a reciprocable frame l having a rack thereon, meshing with each gear or piniom' whereby when said frame reciprocates 'all of said gears and pinions will be rotated and all of said steady rests adjusted equally, andv resilient means for normally moving saidframe 4to turn the screws in .al direction to force the steady restsv toward the work. l l

,17; lIn a grinding machine, the combination with a plurality of independently movable steady rests, of a screw for moving each steady rest toward the work, a gear'or pinion lon eachsbrew, a reciprocable frame having a rack thereon, meshing with said gears or pinions, whereby when said framereciprocates all of said gears and pinionsV will be rotated and all of said steadyrests 'adjusted equally, a longitudinal guide for said frame, and means for clamping the frame at'any desired point lalong said guide.

18. In a grinding machine, the combinationwith a plurality of independently Inovable steady rests, of a screw in contact with ea'ch steady rest, a gear or pinion on each screw, a-reciprocable trame having a rack thereon, meshing with said gears or pinions,

whereby when said frame'reciprocates all of said gears and pinions will be rotated 'and longitudinal guidefor said frame, and an adjustable stop on said guide for limiting the motion of the frame in one direction.

19. In a vgrinding machine, the combina- .tion with a plurality of independently movable steady rests, of a screw in contact with each'steady rest, a gear or pinion on each screw, and a reciprocable frame having a rack meshing with said gears or pinions, whereby when said frame reciprocates all of said gearsand pinions will be rotated and all of `said steady rests adjusted equally, a

vlongitudinal guide for said frame, an adjustable stop for limiting the motion ot the frame in onedir'ection, `and resilient means for forcing the guide .away from the stop vto cause the steadv rests to be mtved yieldvingly t-oward the work.

. In testimony whereof Ihave hereunto set ,my hand,.in the presenceot` two subscribing wit-nesses.v v

CHARLES H. NORTON.`

Witnesses: 1

ALBERT E. Far, v @Fonnnsr WnssoN.

100 all of -said steady rests-adjusted equally, a 

